Rayon spinning machine



Filed May 9, 1930 avwe/ntoz 3 Julius firelzzz'qger Gum/" Patented Nov.13, 1934 =RAYON SPINNING MACHINE Julius' Brenzinger; Fairfield, Conn,assignor to The Max Ams Chemical Engineeringv Corporatron,Bridgeport,.0.onn., a. corporationof Connecticut Application May 9,1930, Serial No. 450,950

. 4 Claims.

.The present invention relates to rayon-spinning machines, by whichismeant machines that form threads or the like from a synthetic fluidmaterial.

Machines of this type are characterized by a pump thatdelivers fluidmaterial to a setting bath and a spool which winds the thread thusformed as it emerges from the bath. As wound material accumulates on thespool' its diameter increases and, consequently, said spool winds moreand 10 more'thread per revolution as its diameter increases. It hasheretoforebeen the practice to have the spool rotate at a uniform speedand to have the, pump deliver fluid material at a constant rate. I havefound that, in these circumstances, the. thickness. of the threadgradually diminishes asthe diameter of the wound material on the spoolincreases. The main object and feature of this invention is to socoordinate the speed at which the thread is being wound and the rate atwhich the fluid material is being supplied that the thread will havesubstantially the same thickness throughout.

In the accompanying drawing the invention is shown in a concrete andpreferred, though somewhat diagrammatic form, the single figure of thedrawing representing so much of a spinning machine as is essential tothe understanding of the invention.

1 represents a pump of any suitable character to deliver fluid materialsupplied by duct 2 to setting bath 3 where thread 4, or the like, isformed, said thread being wound on rotatable spool 5 as it emerges fromthe bath. 6 Indicates a thread guide that passes back and forth to laythe thread in the proper manner on the spool. It will be understood thatthe continued operation produces a body of wound material '7 on thespool, that this increases the diameter of the wound material and windsthe thread at a constantly increasing speed.

In the exemplification of the invention here shown, shaft 8, on whichthe spool is mounted, is driven at a substantially constant speed frommotor 9, the transmission members being here as follows: sprocket wheel10, chain 11, sprocket wheel 12, shaft 13, sprocket wheel 14, chain 15,sprocket wheel 16, stub shaft 1'7, pinion 18 and gear 19 on shaft 8.Pump 1 is here driven from the motor through suitable change speed gear-""50 ing which here takes the following form: shaft 13 carries a pulley30 to receive belt 20 that extends to another pulley 31 on shaft 21;shaft 21 carries a bevel pinion 22 that meshes with bevel gear 23 whichlatter, in turn, drives shaft "55 24 by means of pulleys 25 and belt 26.Shaft 24 -ment being such that when the faces of flap- "6 0 proach eachother the faces of 31' recede' from each other and .vice versa, anditwill be'under- 'stood the effectivediameters of the two pulleyswithrespect ,to belt 20 are thereby changed and "thespeed' of shaft 21varied. The device for "65 effecting this change automatically is'heraas follows: One or both of the faces of each pulley 30 and 31* areslidable on their supporting shafts. 32 and 33 indicate. two levers, each pivoted at an "intermediate'point'34 or 35, and each-lever is "70pivotally connected" at 36*or 37 to one'faceof pulley 30, and at 38 or39 to one face of pulley 31. The lower ends of levers 32 and 33 areurged toward each other by spring 40 and are provided with cam rolls 41to engage cam or wedge 7'5 42. This cam carries a rack 43 engaged bypinion 44 to which latter is attached a ratchet 45. This ratchet 45 isdriven by a pawl 46 pivotally mounted on rocking frame 47 supported onpivot v 48. The rocking motion of this frame causes 0 the pawl to turnthe ratchet and the pinion thereby causing the wedge to enter more andmore between rolls 41, which action in turn swings levers 32 and 33 tomove the faces of pulley 30 A nearer together and the faces of pulley 31fur-- 5 ther apart. This movement, it will be observed, changes thespeed relationship of the pulleys and belt and increases the speed ofthe pump so that fiuid material is delivered by it at an increasing vrate. 49 indicates a stop pawl for ratchet 45. -90 Rocking frame 47 isactuated by eccentric 50 carrying ratchet 51, which ratchet is moved bypawl 52 carried by eccentric 53. 54 indicates a stop pawl for ratchet51. Eccentric 53 is driven by belt 55 and pulleys 56 and 5'7, the latterof 5 which pulleys is mounted on shaft 8 carrying the spool.

At the beginning of the operation, the thin end of the wedge is betweenrolls 41 and the pump is being driven at a speed which will cause it to1 deliver fluid material at a rate that coordinates with the effectivediameter of the spool. Shaft 8 of the spool runs at a constant speed. Aswound material accumulates on the spool, its effective diameterincreases and it winds more and more thread per revolution. Rotation ofspool shaft 8 causes the wedge to enter more and more between the rollsand to increase the speed of the pump to deliver fluid material at v, anincreasing rate so that a thread of substan- "HQ tially uniformthickness is produced'during ,a

given cycle of operation of the machine. The action can be made verygradual, in fact the rise of the wedge can readily be made as low as oneinch per hour, but, whatever the increase in effective diameter of thespool,'the parts are so proportioned that a corresponding increase inspeed of the pump takes place.

When the spool is full or the winding operatio is finished, the pawlsthat move and support the wedge are released and the wedge is loweredmanually after which a new cycleof operations can begin.

I claim:

1. A rayon spinning machine including: a pump to deliver fluid materialto be formed into thread or the like, a rotatable spool to wind thethread as it is being formed with a gradually accelerated effectivespeed as the diameter of wound'material increases thereon, means torotate the spool at a substantially constant speed,

'a change-speed transmission means to drive the pump, and arectilinearly movable taper-member actuated by the rotation of the spoolto autogradually increase thespeed of the pump.

matically adjust said transmission means to 2. A rayon spinning machineincluding: a

pump to deliver fluid-material to beformed into thread or the like, arotatable spool 'to wind the thread as it is being formed with agradually accelerated effective speed as the diameter of wound materialincreases thereon, a changespeed device having a constant-speed memberand a variable-speed member, motor means to drive the constant-speedmember, transmission means I to drive the spool from the constant-speedmember, transmission means to drive the pump from the variable-speedmember, and a rectilinearly movable tape-member actuated by the rotationof the spool to vary the speed of the variablespeed member in accordancewith the number of revolutions of the spool in a given cycle.

transmission means to drive said pump and spool and to automaticallyvary the speed relation of said elements to thereby coordinate the rateat which the fluid is being supplied and the speed at which the threadis being wound, comprising a change-speed device and a rectilinearlymovable wedge-member. actuated by the rotation of the spool to controlthe change-speed device.

4. A rayon spinning machine including: a pump to deliver fluid materialto be formed into thread or the like, a rotatable spool to wind the thethread as it is being 'formed to produce a. body of wound material ofincreasing diameter, and transmission means to drive said pump and spooland to automatically vary the speed relation of said elements to therebycoordinate the rate at which the fluid is being supplied and the speedat which the thread is being wound, comprising a change-speed devicehaving opposed pivotally supported members and a rectilinearly movabletaper-member actuated by the rotation of the spool to engage between theopposed members to thereby control the change-speed device.

JULIUS BRENZINGER.

